136. Andy Carroll, 2010

Keith Hackett's verdict

1) You need to get a grip on the situation and act decisively. Send the manager from the technical area, and inform him that he will be reported to the authorities. Explain to the other manager that, unfortunately, he will now have to continue with one player fewer – and restart with a dropped ball. Thanks to Richard Clark for the question. 2) The substitution is technically complete, so show the abusive player a red card and make sure he leaves the technical area completely. The substitute, though, can now stay on the field. This is a rare case of a red card punishing a player, but not his team – they continue with 11 men on the field, and their full remaining quota of substitutions. Restart play in the normal way. Jamie Fleming wins the shirt. 3) If you are satisfied that the tug on the shirt represented the denial of an obvious goal-scoring opportunity then send the defender off, and restart with a penalty. But you should not let the striker get away with his behaviour either – show him a yellow card for unsporting behaviour, and make it clear you don't need his input into refereeing the game. Thanks to Wendell Mac Gibbon.

Cult classic cartoon strip You are the Ref appears exclusively this season on theguardian.com on Fridays, with Keith Hackett's official answers following on Mondays. Click here for the story behind the strip, from its debut in 1957, to artist Paul Trevillion - the man who brought it to life.